Brake shoe



May 29, 1928.

L. E. LA BRIE BRAKE SHOE Filed Juxie 5, 1926 2 Sheets-Sheet INVENTOR Lumen E.LA BRI .IJI

ATTORNEY May 29, 1928.

L. E. LA BRIE BRAKE SHOE Filed June 5, 1926 2 Sheets-Sheet 2 Y INVENTOR L DGER E LA BRIE .u): ATTORNEY Patented May 29, 1928.

L PATENT oFFicE.

LUDGER E. LA BRIE, OF SOUTH BEND, INDIANA.

BRAKE SHOE.

Application filed June 3,

This invention relates to brakes and is illust rated as embodied in an internal expanding automohile ln'ake having shoes of novel and improved construction. An object of the invention is to provide shoes pressed til vii

from sheet metal of such construction that metal of relatively light gauge may he llSQt, while at the same time the shoe is so reinforced that it of exceptional strength and rigidity, thus providing a shoe which is both stronger and cheaper. It is also important that the shoe he formed in such a manner that its cylindrical lace may he of evtjreniel accurate curvature, thus minimizing the tin ishing operations on the shoe, this heing especially important sinee it is: not t'easihlo to remove an)' considerable amount otmaterial from the friction face when the metal is of very light gauge. At the same time the light gauge metal is much easier to work, permitting the use of lighter and cheaper prcsses and facilitating the manufacture generally.

Having these objects in View, the invention contemplates the eonstructii'in of the shoe in such a u'ianni-r that the stamping; includes a cylindrical flange terminating: at one edge of the flange, this; preferably being alone one side of the friction are of the shoe also, and continuing inwardly at the opposite edge (i. e along the othei side of the friction face) to form a stitleiiiiig portion which is shown as including an inwardly projecting stitl'ening: weh connected to the cylindrical flange hy a hraeiuo portion. When this connectingor bracing portion used, it may be. pressed down at spared ill-- tervals toward the inside of the cylindrical flange to permit the ready insertion ol rivets or other tastenings.

In all except the lightest shoes, l preter to strengthen the ahove-descrihed construetiou hy means of a separate stamping or ttllllYil lent memher havin; [)Ul'il lli respectively engaging the stitlenin; .weli and the cylindrical flange descrihed ahove. and it is desirahle that these portions of the reinforcing member he eonneeted h) an inclined portion diverging from the int-lined portion of the shoe bod) descrihed above so that the shoe inc tide a hollow or truss-ed hod v 'prel'erahlv generally triangular in crossa-tion, lltllr; givine vmaximum rigidity. This inelimd portion also may he pressed down at .'interrats for the t'astenin \Yheu thus reint'oruiid, the shoe may he ltgdt't J-Li a: iei lt 1926. Serial No. 113,367

up of two separately-'l'ormed stampings with cylindrical flanges secured together and proriding' the friction face of the shogand with inwwally-extending \Ytltb welded or riveted togethenat their inner edges, the shoe pre t erahly being hollow, and having (if desired) two series of depressed rivet seats.

Other features of the. invention relate to a novel mounting of a thrust member to he engaged by the cam or its equivalent, and to other nov l and desirable particular eonstruetions of the parts which will be appar' ent from the following, description of the hralte shown in the acctnnpan ving drawings, in which: i ii Figure, l is a vertiral section through the lu'ahe nst inside the head of the hralie drum showin the brake shoes in side elevutitiut',

lfigy uro if is an elevation of one of the end shoes looking toward the cam end of the shoe; 7

lfignre it is a partial section through the cam end of the shoe on the line 3-5 o l Figure 2 and showing; the mounting of the (3H1 thrust plate: 7

Figure 4 is a section on the line -1--i of Figure 2 showing; the integral hearings engaging the pivot for the shoe:

Figure 5 is; a section on the line it; of Figure E2 showing the construction of the hodv of the hoe;

Figure ii is a partial secti n on the line (i-ti of Figure l showing the overlapping ends; of two of the shoes:

Figure 7 is an elei ation correspmidirig to Figure i. but showing: a modified shoe having: a reinforcing inr-mher extending throughout its length: V

Figure 5 is a side elevation oi the slug-re of Figure 7:

Figure l) is a section through the shoe of Figures 7 and on the line tv----tl of Figure 8;

Figure 10 is a similar section on the line ltt ttl of Figure Figure ii is a section corresponding to l igure 9 but showing a third modification of the shoe. 7

Figure 12 is a section corresponding to Figure 9 but showing" a fourth mmtitication of the shoe: i

Figure 13 is a side elevation of the central shoe of the brake shown in Figure 1;

l igl'ltl't I i l an inside elevation of the central shoe sihown in Figure 13;

Figure is a section thiouprh the shoe of Figure 13 on the line lt3--l 5 of Figure 13;

Figure 16 is a diagranmiatic view showing ne of the steps in manufacturing the shoe ot' ligure and Figure 17 a diagrammatic side elevation looking in the direction of the arrows 17l7 in Figure Hi.

The particular braltc shown in Figure 1 in ludes a drum 10, at: the open sine of which ther may be arranged a. backing plate or other suitable support 1:2. and within which are arranged three bralte shoes 14, 1.6. and 18. the shoes 14 and 18 preferably being identical and interchangeable. Shoe 1(i'is anchored by being mounted on a pivot 20 carried by the backing plate 12 while shoes 1-1 and 18 are connected to the shoe 1G by means of pivots and 24. the details of the pivot 24 being shown in Figure 6.

The brake may be applied by suitable means such as a double cam acting against the resistance of a return spring 28 connecting the shoes 14 and 18, the shoe 16 being applied by the shoes Hand 18 (particularly the latter) against the resistance of an auxiliary return spring 30. Each of the shoes 14 and Y18 is forked at its lower end to straddle one end of the shoe 16, the arms forming the forked end of the shoe being provided with relatively large openings 32 to provide ample clearance for the anchor 20.

The present invention relates to the construction of the shoes of a brake such as described above or any desired equivalent brake, preferably in such a manner that strong and rigid shoes may be constructed in an economical manner by pressing from sheet metal of relatively light gauge. Each of the end shoes 14 and 18, in the modificat on shown in Figure 1, comprises a pressed me al body including a cylindrical flange providing the friction face supporting the brake lining 42. and terminating at one edge of the flange (at the lower side edge 01" the friction face of the shoe in Figure 5.) and integrally continued at the upper side edge of the friction face of the Shoe in Figure 5 to form a connecting portion 44 extending toward the central plane of the shoe and pr jected between the sides of the shoe as a stitl'ening portion or web 46. An advantage of a construction of this sort is that the blank may initially be pressed out between two dies with connecting portion 44 inclined as appears in Figure 16. so that the portions 4 and 16 bottom in the die while the flange 10 is drawn out against the side of the die. This gives much greater accuracy in the curvature of the flange 40 than is possible when a cylindrical friction face is bottomed in the die. The stamping may be compressed to the form shown in Figure 5 by an additional ope 'ation illustrated diagrammatically in Figures 16 and 17. in which figures the support for the cylindrical flange 40 is shown at 48 and a support for the stiffening web 46 is shown at 50. 'hile the flange -14! reds on the support 48 with the web it; in engagement with the support fill. a die member 5:3 comes down on the connecting portion 1! and compresses it against the in ide of the flange 40. thus forming the T-scction shoe of Figure 5.

In order to form a fork at the pivoted end of the shoe, I attach a separate stamping :31 as shown in Figures 2 and 4, which is secured by rivets or the like to the web 46 at its front end, and is then otl'sct in one direction while the web 46 is oll'set in the opposite direction so that the separate part 54 and the web 46 project beyond the friction face of the shoe as a pair of spaced arms adapted to straddle shoe l6 and be mounted on one of the pivots or 24. The web 46 and the part 54 may be provided with tubular bosses 56 forming bearings to be sleeved upon the pivots 22 and 24. At the opposite end a suitable cam thrust member 58 may be arranged in engagement with the end of web 46, the particular thrust member shown being fastened in place by means of a lug or other part 60 engaging or secured to the inner face of the flange 40 of the shoe and a lug or part 62 engaging and secured to one face of the web 46.

In the heavier brakes, that is, brakes of the larger diameters, I prefer to continue the part 54 as a reinforcing member 154 extending throughout the length of the shoe. \l'hen this is done I prefer that the portion 144 of the shoe body. corresponding generally to the pol-601144 described above, should be an inclined portion connecting the flange 40 with a relatively short stifi'ening web 146, and depressed at intervals for the lining riv ets or other fastenings 60 as appears in Figures 8 and 10. The part 154 may be provided with an inclined portion 62 connecting the portions which engage and are secured to the flanges 40 and the web 14-6. the two inclined portions 2 and 144 diverging from each other to form a hollow shoe body, preferably of triangular section. The inclined portion 62 may also be depressed at intervals as shown at Figure 10 for the lining rivets (30.

If preferred. in lieu of an inclined portion 62. a reinforcing member 254 may be provided as shown in Figure 11 having a flange engaging and secured to the inner face of the flange 41) and having a straight or ra dial web projecting approximately in the central plane of the shoe iito engagement with the web 146. The construction in Fig ure 12 s substantially the same as that in Figure 0 except that in Figure 9 the web 146 has at, its inner edge a short laterally turned stitl'ening part 64 which isomitted in Figure 12 and in Figure 12 the outer part of he reinforcing member 154 is spun over the tree edne of the flange 40 to give a finished roundedappearance loflthc cdgeof i-he shoe. Thus tin-re is provided. a strong. rigid, hollow shoelmilt-up of :sl'anipings with cylindrical hingessecured togethcr to pro- 6'. yide the-'friction'fucc, and with stiffening:

webs sccln'eil together in u jol'nt runningl thwise of the shoe, and thus reinforcingeuoiother.

Asshown. in Figures 13. 1i. and la"), the to central shgic preferably includes one part snbstuntiully as described above and including the flu go 40 currying ihc brake lining l2 and integrally connected'to a slilleningweb 46 by a. connecting portion 44, exceptl-s that the shoe is not. fovked at either endythc reinforcing-meinber-..in this case being suhpant including a cylindrical flange forming at least port of the friction face and termi :10

other edge intognally continued to form a stiffening webam'imged between the edges ofthe shoe, said other edge forming one side edge of the friction face of the shoe.

2. A brake shoe comprising a" pressed metal parb'including a cylindrical flange forming afi least part of the friction face and terminating at one edge of said flangeand at the other edge integrally continued to form 'a- 4 stiffening web zirmngecl'ebet-n'een the edgcsof 1 the shoe, said other edge forming one side edge of the friction fuco of the shoe, to-

gethcif with a bracing portion connecting the flange and web. I

3. Al brake shoe comprising a pressed metal part including a cyliiidrical fla'iigo forming at lcosls purl; oi the friction face and tenninuting at one edge of said flange and at the other edge integrally. continued to form a stiffening web arranged between the edges of the shoe; said other edge forming onosiclc edge 'nflhe friction lawn of the shoe, tog'clher with an incline-dlieu/cine port-ion connecting the flange and well the hruciug pm'linn'heing picxfiedloxvn iit'intcivals toward the inside of the cylindrical flange.

4. A brake shoe colnprisiugn pressed m'clul part including a cylindrical flange forming at least pmlaof thev friction face and towni mil ing at, one edge of the flange and at the other edge of'tl|e-fiicl.ion Face integrally conl-inucd from one side edge of the shoe us a stint-nine \vch olfsettoward the central plane of the shoe and including zl bracing portion on connecting the flangeeand the. inner part of (ill - limb ln-zwinlo iorlion.

olielrwise thgin hylho 'terms of the appended noting atone edge ofsaid flange and at the formed messed n chilr pant in'cl uling a; cylindrical flange cooperatingwith the {inshcyl inch-lull ,llunge' and an integral still'en ing Web between the Side edges of the shoe and To an inclined bracing portion connecting the Range and the web and diverging from the- 9. A brake. sli'oecomip'risino a pressed; iueinl pnrtincludiizgwn c \-'lindricul flange-4 forming at least partof the-friction face and integrally continuedalong one side edge of o the shoe 41s a stiffeningweb, in' comhinaliouzi with a sepnmt ely-formed )IOsfifll motel 'paitincluding a. cylindrical-4 ange coo emti'ng 'fi with the first cylindrical flange an" unnI-' tegrizl stiffening web secured to the limit wob. i 6. A brake shoe comprising a =piessed" 1 metal part including acylindviczpl flange 85 forming at least, part of the friction face: 21nd integrally continued along one side edge of the shoe as a stiffening-web arxraxigdberi-F trally of the shoe and an inclinecl=hrnci'ni;'

with In scpzu-utly-ikinned' pressed metal part including n cylindrical. flange cooperating with the first cylindrical? flange and an integ al stiffening 'web and ranged cent'mlly of the shoe and an inclined bracing portion connecting the flange ahdfl" weh {1nd diverging from the first financing: poriion, the --inclinorl portions being pi gsfi'd down at intervals towzn'cl the cylindcifcjzilgb flanges. f l .7. A brake shoeconipi'isinma, mjetal part including a cylinji'col flange. forming at least purl; of the friction'ifiuco. and integrally continued along one side edge of i-hoshoe as n centrally-arranged Stifiening .19 wch,' .in combination with a separately; formed ii-cased metal part includingra 6:55;, lindrical hinge cooperating with.thefir s icy;'v I lindrical flange and on ihlegml centrally? arranged stiffening .n'oh, one of saidllncsid 7 0 Inclll parts being formed with ,zin'inclincd' ln'acing portion connecting itsilimgo and its web. i

8. A bi-nico shoe. comprising a pressed metal part including o cylindrical;flange forming at least part of the friction face and inlcgrzilly continued along one-side edge of.lhc z'hoc us' a slill'cningAveh, in -ct-i'uihiliii== tion with :1 so iarulcly-loclued prniqeclnucleipa rt includi ng u ii m-h'ical flange *coopcriii "i 3 ing with lhclinslcvlindricul flange anda'iiin leg-ml slilfcuing \iwh'sccurod lo l lie'lirsV VclL one of's'aid pressed metal parts being f on i ecl with an inclined. hrzicing portion-connect ing iis'llunge with its \v el), fthe inclindl .lu-aci'ng portion being pres-aed'clonn iii, 'lm-vals toward one of the cylindrii' f 9. A brake shoe including a' puisd'ineial part having a cylindrical flange forming the entire friction face offihe shoe and hersaid port integrally continued at the other side: cdgc of the shoe toward the central plane of the shoe and then projected inwardly to form n stiffening web between the edges of the shoe, in combination with a scparntelviormcd reinforcing member ongaging the inner face of the cylindrical flange adjacentits free edge and also, en-

gaging said st-iliening web.

11. A brake shoe including a pressed metal part having a cylindrical fian e forming the entire friction face of the s hoc and terminating at one, side edge of the shoe, said port integrally continued at, the other Side edge of the shoe toward the central jilane of the shoe, in combination with u separntsly-formed reinforcin" member secured to said intcgrally-ccntmued portion between the sides of the shoe and having a cylindrical flange on aging and secured to the inner face of the first cylindrical flange at its free edge.

12. A brake shoe including a pressed metal part having a. cylindrical flange form-f ing the entire friction'face of the shoe and terminating at one side edge of the shoe, said part integrally continued at the other side edge of the shoe as a stiffening web, in combination with o separately-formed rein iiorcing member secured to said \rebund to the cylindrical flange.-

13.' A brake shoe including a pressed metal part: having a. cylindrical flange forming the entire friction face of the shoe and terminating atone side ed e of the shoe,

'snid part; integrally continued at; the other side ed e of the shoe .as a .stitfening web, in com inution with :1- separately-formed reinforcing member secured to said-web and to the inner face of the cylindrical flange and undo dying n portion u f the flange.

14. A hrnkc shoe including a cylindrical friction partund a stiffening web, and comprising, in combination therewith, a thrust member cngnging the end of the web and having a part enga ing the inner face of the frictiompart and secured thereto.

15. A brake shoe friction part and a stilleningweb, and comprising, in combination therewith, a. thrust member engaging the end of the. web and having 3 part en agin'g. the inner face of the friction part and securedthereto, and her which is formed with an outwardl drical face and \vlnchus formed with two' including a cylindrical ing another part engaging and secured to the side of the stitienm web.

16. A hollow brake s ime including-sepahaving stiffening portions secured together j a-djnccnt their inner edges in a joint running lengthwise of the shoe.

18. A hollow brake shoe having a cylindrical friction face and with connected webs forming the sides of-the hollow shoe body and depressed at intevx ls toward the triotion face to permit the insertion of lining rivets.

1Q. A brake shoe "having a. hollow body structure built up of two separately-formed stampings secured together and having two stiffening webs forming the-sides of said hollow body- .structure, said structure being outwnr'dlv cylindrical.

20. A rake shoe having a hollow body structure built up of two separately-formed stampings secured together and harin two stiffening webs forming the sides 0 Said hollow body structure, and having two cylindrical flanges formed respectively on the two] stampings and permanentlj secured toct er. g 21. A hollow brake shoe having a both which is outwardly-c lindricnl and which on its inner face is epressed atintervals to form seats for lining fastenings.

22. A hollow brake sho having a body -cyl inseries of spaced portions on'positc the c lin- .dricnl face and which series extend a on the opposite sides of the shoe and whic portions are formed to permit the ready insertion of lining fnst'enings extending through the c i-linclrical face.

23. A hruke shoe having ahollow body structure built up of two sebarately-formed stampings secured together and having two stiffening-Webs formingthe sides of said hollow body structure. am l having a cylim dricnl portion formed lly cylindrical flanges formed rcsipectirely on the tu'owstain'piiigs,

each of sai of spaced portions sertion at through said permitting the ready inlining fastening. extending friction face.

\ In testimony whereof,v I have hereunto signed my name.

LUDGER E. Ln BRIE.

wohs being formed with a series 

